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LOCATION.--Lat
43°27'06", long 76°30'19" referenced to North
American Datum of 1983, Oswego County, NY, Hydrologic Unit 04140203, on
right bank at New York State Oswego (Barge) Canal Lock 7 in Oswego, 0.8
mi upstream from mouth.DRAINAGE AREA.--5,100 mi².PERIOD OF RECORD.--October 1900 to April 1906, October 1933 to
current year. Monthly discharge only for some periods, published in WSP
1307. Prior to January 1904, published as "above Minetto" or
"near Minetto." January 1904 to April 1906, published as
"at Battle Island." Records for April 1897 to September 1900,
published in WSP 65 and for October 1927 to September 1928, published
in WSP 644, have been found to be unreliable and should not be
used.REVISIONS HISTORY.--WDR NY 78-1: Drainage area.GAGE.--Water-stage recorder. Datum of gage is 245.12 ft above
NGVD of 1929 and 244.47 ft above NAVD of 1988. Prior to October 1933,
nonrecording gage at site about 6 mi upstream at different datum.COOPERATION.--Records of lockages at Lock 7 provided by New York
State Canal Corporation, records of elevations of Lake Ontario provided
by U.S. Army Corps of Engineers, and records of daily discharges for
Oswego River High Dam upstream provided by Niagara Mohawk Power
Corp.REMARKS.--Prior to 1933 and subsequent to 1972, flow in Oswego
(Barge) Canal not included. A large amount of natural storage and some
artificial regulation is afforded by the many large lakes and the Erie
(Barge) and Oswego (Barge) Canal systems in the river basin. Large
diurnal fluctuations at low and medium flow caused by powerplants
upstream from station. Oswego River basin receives water from Erie
(Barge) Canal through Lock 32 near Pittsford. Water may be diverted
into or received from Mohawk River basin through summit level of Erie
(Barge) Canal between New London and Utica. Nearly all of the flow from
14 mi² of the Tioughnioga River basin may be diverted into De Ruyter
Reservoir in Oswego River basin. From 1931-98, a large part of flow
from 45.5 mi² of Mud Creek drainage area (Susquehanna River basin) had
been diverted into Keuka Lake (Oswego River basin) for power
generation.
Water Years 2014-17: Records good except those for estimated daily
discharges, which are fair.EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 37,500 ft³/s,
Mar. 28, 1936, includes daily mean discharge of canals; maximum gage
height, 13.46 ft, Apr. 10, 1940; minimum discharge (river only), 30
ft³/s, Nov. 6, 1944.PERIOD OF DAILY RECORD1.-- WATER TEMPERATURE:
December 2010 to current year. SPECIFIC CONDUCTANCE: December 2010 to
current year. pH: December 2010 to current year. DISSOLVED OXYGEN:
December 2010 to current year. TURBIDITY: December 2010 to current
year.INSTRUMENTATION1.--Refrigerated automatic sampler
since July 2010. Multi-parameter water-quality sonde measures water
temperature, specific conductance, pH, dissolved oxygen, and turbidity
at 15-minute intervals since December 2010.COOPERATION1.--In cooperation with the U.S.
Environmental Protection Agency's Great Lakes Restoration
Initiative (GLRI).REMARKS1.--Turbidity record is subject to low-end
adjustments when values are below zero. On days of missing record or
instrument malfunction, 0.0 FNU may have occurred.EXTREMES FOR PERIOD OF DAILY RECORD1.--
WATER TEMPERATURE: Maximum, 29.5°C, July 17, 2012; minimum, -0.1°C, on
several days during winter period.
SPECIFIC CONDUCTANCE: Maximum, 1,080 uS/cm @ 25°C, Feb. 20, 2011;
minimum, 388 uS/cm @ 25°C, May 2, 2011.
pH: Maximum, 9.2, on several days; minimum, 7.3, Jun. 28, 2012.
DISSOLVED OXYGEN: Maximum, 16.0 mg/L, Jan. 22, 2016; minimum, 3.3 mg/L,
Aug. 6, 2012.
TURBIDITY: Maximum, 62 FNU, Sept. 7, 2011; minimum, 0.0 FNU, Sept. 14,
2012 [0.0 FNU may have occurred on days of missing record or instrument
malfunction].1 Water-Quality Records